CO2 Controller

Effective pH control in pool water

The ProMinent CO2 Feeder is designed to utilize Carbon Dioxide (CO2) in the control of pH levels in pools and spas.
There are a number of advantages when using CO2 for pH control compared to acid. Adding CO2 will not contribute to a TDS increase in water, thus reducing the amount of make-up water required to maintain the water quality. It is much safer, as there is no mineral acid solution or fumes present on-site, which solves the problems associated with handling acid and corrosive fumes. It is also simple to install and operate.
The ProMinent CO2 Feeder is equipped with all the necessary components for easy installation, reliable performance and safe operation. The design incorporates an electronic solenoid valve and a manually adjustable flow-meter.

Order Information

Description Part No.
CO2-50 Feed Unit, 5-50 SCFH 7746991
CO2-200 Feed Unit, 20-200 SCFH 7746928
CO2-50E Feed Unit, 5-50 SCFH w/ Educator
(Consists of P/N: 7746991 + 7746942)
CO2-50D Feed Unit, 5-50 SCFH w/ Diffuser
(Consists of P/N: 7746991 + 7746926)
CO2-200E Feed Unit, 20-200 SCFH w/ Educator
(Consists of P/N: 7746928 + 7746942)

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  • Overall Feeder Dimensions: 8.2”H x 7.4”W x 7.5”D (w/ Mtg. Feet)
  • Overall Weight of Feeder: < 5 lbs.
  • Power Requirements: 120VAC, 60Hz, 1 Phase, 0.15 Amp
  • Maximum Volume: 5-50 SCFH or 20-200 SCFH
  • Maximum Pressure:  100 PSIG
  • Normal Operating pressure: 40 PSIG
  • Recommended Running Temperature:  +40oF to 100oF
  • Inlet Connection Size: 3/8” OD Tube
  • Outlet Connection Size: 3/8” OD Tube


Cut Sheet: CO2 Controller | Part #: 7750507 | Updated: 8/10/18

Manuals And Instructions

Manual: CO2 Feeder | Part #: 7746944 | Updated: 9/14/12